Payment system, payment method, and non-transitory computer readable medium

A payment system includes: an acquisition unit that acquires an image including a payment target product; an estimation unit that estimates a product that corresponds to an object identified from the image; a display unit that displays information on the product in association with the object; a reception unit that receives input indicating intention to register the object, which indicates whether to register the object as the payment target product, from a user; and a registration unit that registers the object in accordance with the input. The registration unit registers the object as the payment target product upon receiving an input indicating that the object should be registered, and does not register the object as the payment target product upon receiving an input indicating that the object should be excluded from the payment target products.